Single exposure positive-working photopolymer element

Details Single exposure positive-working photopolymer element Single exposure positive-working photopolymer element

Filed on

1981-10-01

Date issued

1984-01-24

Examiner

Brammer, Jack P.

Patent Class

Radiation imagery chemistry: process, composition, or product th

SubClass

Imaging affecting physical property of radiation sensitive...

SubSubClass

Radiation sensitive composition or product or process of making

Other Related Categories

430270, 430281, 430288, 430296, 430329, G03C 178

Type

Patent

Status

active

Patent number

044277580

Description

ABSTRACT:
A high speed, positive-working photopolymer element comprising, in order: (1) a support, (2) a nonphotosensitive layer comprising a hardenable binder (e.g., gelatin) containing a releasable hardener (e.g., glutaraldehyde-bisulfite), and an optional colorant, and (3) a permeable photopolymerizable layer. Imagewise exposure of the photopolymerizable layer is followed by diffusion of an alkali through the nonimage area, releasing the hardener. A subsequent wash-off step produces a positive image of the original.

REFERENCES:
patent: 4229517 (1980-10-01), Bratt et al.
patent: 4268601 (1981-05-01), Namiki et al.

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